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CT1X12
CT1X12 Single 12” Kerf Ported Universal Car Subwoofer Box

CT1X12 Single 12” Kerf Ported Universal Car Subwoofer Box

5(17 ratings)

Best price now

$129.99at CT SOUNDSChecked Nov 13

Compared across 2 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Last seen at $129.99 at CT SOUNDS on Nov 13.
  • Checked at 2 stores.

Our take on the CT1X12 Single 12” Kerf Ported Universal Car Subwoofer Box

The CT Sounds CT1X12 is an empty single 12-inch car subwoofer enclosure built for deep, accurate bass. It uses a kerf-style port, a feature usually found only in custom boxes, and is lined with poly-fill to smooth response. Dado and miter joints plus recessed side panels make it rigid and airtight. It suits anyone who wants a universal box that fits many 12-inch subs and is ready to wire with pre-soldered 12-gauge leads. Compared with basic prefab boxes, the kerf port and joinery are its main advantages; owners rate it highly for build quality and output.

Best forCar audio enthusiasts wanting a ported box for a single 12-inch subBuyers who want a universal enclosure that fits many sub brandsListeners who want deeper, louder bass than a sealed boxDIY installers who want pre-wired terminals and poly-fill
Pros
  • Kerf-style port for deeper, more accurate low-frequency output
  • Strong dado and miter joints with recessed side panels for rigidity
  • Poly-fill lining and airtight construction reduce vibration
  • Pre-soldered 12-gauge wires and 8-gauge push terminals for easy hookup
  • Universal 11.34-inch cutout fits a wide range of 12-inch subwoofers
Cons
  • Empty enclosure: subwoofer not included
  • Ported design needs more space than a sealed box
  • Carpet finish may show wear over time
  • No mounting hardware or grille included

CT1X12 Single 12” Kerf Ported Universal Car Subwoofer Box prices at every store

  • CT SOUNDSNew

    In stockReturn policy

    $129.99Checked Nov 13
    Visit CT SOUNDS
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $129.99Free shippingChecked Nov 13
    Visit Amazon

Store links may earn us a commission.

CT1X12 Single 12” Kerf Ported Universal Car Subwoofer Box price history

Lowest price we've seen: $129.99 on Nov 13 at Amazon. Tracked across 1 store since Nov 13.

What reviewers say

  • 5 / 517 ratings

Owners give the CT1X12 top marks, praising its solid build, clean bass, and easy wiring. Many say it sounds better than expected for a prefab box and fits their subs well.

What people mention
  • Build qualityPraisedOwners say the box feels solid and well-made, with tight joints and no rattles.
  • Bass outputPraisedReviewers report deeper, louder bass than sealed boxes, with accurate reproduction.
  • InstallationPraisedThe pre-soldered wires and labeled terminals make hookup quick and easy.
  • FitPraisedThe universal cutout fits many 12-inch subwoofers without modification.
  • SizeMixedSome owners find the box takes up a lot of trunk space, though most accept it for the bass gain.
  • AccessoriesCriticisedA few buyers note that mounting screws are not included, requiring a separate purchase.

About the CT1X12 Single 12” Kerf Ported Universal Car Subwoofer Box

The CT Sounds CT1X12 is an empty enclosure for a single 12-inch car subwoofer. It has a kerf-style port, a design usually found in custom enclosures. The 11.34-inch cutout and universal fit work with a wide variety of subwoofer brands. The internal walls are lined with poly-fill.

The box is built from 3/4-inch MDF. Dado joints connect the left and right pieces to the back, top and bottom pieces. Miter joints join the corners at a 45-degree angle. Recessed side panels add to the air-tight, vibration-free construction.

The box is wrapped in black carpet and has a flush-mounted black terminal cup. The cup has 8-gauge push terminals, with red and black stickers marking positive and negative. Inside, 12-gauge speaker wires are pre-soldered to the terminal cup, so the box is plug-and-play.

Box size
Single 12"
Type
Empty subwoofer box, kerf port
Material
3/4" MDF
Finish
Black carpet
Cutout diameter
11.34"
Mounting depth
13.50"
Gross volume
2.13 ft³
Tuning frequency
34 Hz
Port length
28.43"
Port width
1.63"
Kerf fold
3.93" length, 2.50" width
Dimensions
Length 20.25", height 15.00", depth 18.72" (bottom) and 16.07" (top)
Terminal cup
Flush-mounted, black, 8-gauge push terminals

Questions and answers

Does the CT1X12 come with a subwoofer?
No, it is an empty enclosure. You need to install your own 12-inch subwoofer.
What subwoofers fit this box?
It has an 11.34-inch cutout and universal mounting, so most 12-inch subwoofers from major brands fit.
Is this box sealed or ported?
It is ported with a kerf-style slot port, which typically gives deeper, louder bass than a sealed box.
What are the internal dimensions?
The listing does not state internal volume. Check the cutout and depth against your subwoofer's specs.
Does it come pre-wired?
Yes, it has a flush terminal cup with 8-gauge push terminals and pre-soldered 12-gauge speaker wires inside.
Is poly-fill included?
Yes, the internal walls are lined with poly-fill to help smooth the bass response.
Where is the CT1X12 Single 12” Kerf Ported Universal Car Subwoofer Box cheapest?
At CT SOUNDS, for $129.99, as of our latest check.
What do buyers say about the CT1X12 Single 12” Kerf Ported Universal Car Subwoofer Box?
Rated 5 out of 5 from 17 ratings.
Where can I buy the CT1X12 Single 12” Kerf Ported Universal Car Subwoofer Box?
2 stores we checked sell it, including CT SOUNDS, Amazon.
Internal wiring
12-gauge speaker wire, pre-soldered to terminal cup
Compatibility
CT Sounds BIO-12, HYDRO-12, TROPO-12, OZONE-12, TROPO-XL-12, STRATO-12 and MESO-12 subwoofers